The PTFE Filtration Membrane With A Wide Application, Such As N99, N95, KF94, FFP3 Mask, Medical Cloth, Air Purifier, Air Conditioner, Outdoor Jacket, Gloves, Sleeping Bag Etc. PTFE Membrane Has A 100% Fluoropolymer Coating That’s Chemical And Fire-resistant As Well As Water And Uv-resistant. After Laminated With Non-Woven Fabric(PET/PE/PP